Executive Summary

A technical malfunction in e-voting in Basel-Stadt has severe consequences: 2048 votes could not be counted because three USB sticks containing encryption keys became inaccessible. The public prosecutor's office is investigating on suspicion of election fraud. The incident reveals fundamental redundancy deficits in the e-voting system after 25 years of pilot operation and jeopardizes the planned expansion of the system to 30 percent of all eligible voters.

Persons

Topics

  • E-voting security
  • Cryptographic infrastructure
  • Election fraud suspicion
  • Digital voting in Switzerland

Clarus Lead

The canton of Basel-Stadt loses access to encrypted USB sticks from 2018 during the last ballot that store keys for opening electronic ballot boxes. Result: 2048 votes are provisionally deemed invalid, although they are technically valid. The public prosecutor's office suspects deliberate manipulation and has initiated investigations. Critical for decision-makers: The system shows, after a quarter-century of pilot operation, unresolved security deficits – particularly missing redundancies in key management.

Detailed Summary

The e-voting system in Basel-Stadt is based on a two-key model: Each electronic ballot box is stored with two 50-digit encryption keys – one with the electoral committee, one with the technical administrators group. Only together can these two keys open the ballot box and read the result. Each key exists in triplicate on USB sticks. During functional tests before the ballot date, the storage media still worked; at the second check shortly before the poll, access to all three administrator USB sticks was lost.

The affected sticks date from 2018 – a considerable age for electronic storage media. Whether aging, storage damage, human error, or manipulation caused the problem remains unclear. Forensic specialists from the cantonal police were unable to crack the PIN-protected and highly encrypted sticks. The public prosecutor's office suspects deliberate manipulation and has opened proceedings for election fraud after the criminal police discovered corresponding evidence.

The incident forces Basel-Stadt to act: The pilot operation is suspended until the end of 2026. The original plans to gradually expand the system from mid-2026 to 30 percent of all eligible voters (currently 10,300 Swiss citizens abroad and 30 persons with disabilities are allowed to vote via e-voting) are paused. The canton orders external investigations.

Key Statements

  • Critical system failure: Multi-year-old USB sticks prevent access to encryption keys; 2048 votes cannot be counted
  • Investigation obligation: Public prosecutor's office opens proceedings on suspicion of election fraud; human error and manipulation are not excluded
  • Structural deficits: Missing redundancies in key management after 25 years of pilot operation undermine confidence in e-voting
  • Political consequence: Pilot operation suspended until 2026; expansion plans paused

Critical Questions

  1. Data Quality/Source Validity: What technical diagnostics were performed to determine the exact cause of failure (aging, damage, encryption error, manipulation) – and why are detailed forensic reports missing?

  2. Conflicts of Interest/Independence: To what extent is an external investigation by third parties necessary compared to internal government forensic specialists to establish credibility – particularly in cases of manipulation suspicion?

  3. Causality/Alternatives: Could hardware failures (e.g., USB contact corrosion) rather than intentional sabotage sufficiently explain the loss of access – and where is the line between negligence and criminal offense?

  4. Feasibility/Risks: How would a redundant backup system (e.g., multiple key copies distributed across different storage types or geographic locations) have prevented the incident – and why was this not implemented?

  5. Side Effects: Will the 2048 affected voters be compensated or informed – and how will their constitutional voting rights be legitimized retroactively?

  6. System Risk: If the e-voting system in St. Gallen, Thurgau, and Graubünden uses the same architecture, are similar failure risks to be expected there?

Bibliography

Primary Source: E-Voting in Basel: Malfunction Leads to Election Fraud Proceedings – NZZ, 10.03.2026 (Author: Lukas Mäder)

Verification Status: ✓ 10.03.2026

This text was created with the assistance of an AI model. Editorial Responsibility: clarus.news | Fact-Check: 10.03.2026